Guard for pulleys



May 24, 1927.

H.' F. JONES GUARD FOR PULLEYS Original Filed Aug. 5. 1924 //7 venfor:

flaw/0 E Jonas,

Patented May 24, 1927.

UNITED STATES PATENT OFFICE.

I HAROLD FRANK JONES, OF CHICAGO, ILLINOIS, ASSIGNOR' T0 \VESTERN ELECTRIC COMPANY, INCORPORATED, OE

Original application filed August 5,1924,

NEW YORK, N. Y., A CORPORATION OF NEW YORK.

GUARD FOR PULLEYS.

21, 1925. Serial No. 70,550; v

This invention relates to guards for pul leys. and more particularly it relates to guards for pulleys used in guiding traveling material, and has for its primary object the provision of an improved guardwhich permits the threading of a guide pulley with the material to beguided in an efficient and expeditious manner. ,7

This application is a division. of my copending application,Serial No. 7 30,153, filed August 5, 1924, which issued April 6,1926, as U. S. Patent 1,579,769. A

In accordance with one'em odiment of this invention, the above objectis accomplished by providing a guide'pulley comprising a pair of flexible arms supported at either side of the guide pulley about the axis thereof and carrying at their free ends an inwardly projecting lug having a rounded end, the lugs normally engaging each other at a point in line with the center of the guiding surface of the pulley and adapted to be separated for the purpose of threading the pulley with the strand.

Other objects and advantages of this invention will more fully appear from the following detailed description taken in connection with the accompanying drawings which illustrate one embodiment of this invention, in which a Fig. 1 is a front elevational View, partly in section, illustrating a stranding machine unit having the improved guard of tliis invention embodied therein;

Fig. 2 is an enlarged plan view of a guide pulley with the guard mounted thereon; and

Fig. 3 is a side elevational view thereof.

In the drawings, the improved guard of this invention is shown applied to the guide pulleys of a stranding machine such as is usel in the manufacture of telephone cables and in which 10 indicates generally one unit of such a machine. A drum 11 is revolubly journaled in bearings 12 and 13 by hollow end trunnions 14 and 15 respectively, the bearings 12 and 13 being rigidly supported on upright standards 16 and 17 respectively, which are reinforced by a cross member 18. Guide rings 19 and 20 are mounted on the drum 11 on opposite sides of the bearing 13 in such a position that the openings therein are in longitudinal alinernent with the opening in the trunnion 15.

being one for each supply spool.

carrying guard.

A polisher 21 is supported on a bracket 22 secured to the standard 17.v A pair of annular bands 23-are rigidly supported about the drum 11 and are provided with a-plurality of equally spaced spindles 24, which aren'iore specifically described in the co-pending application of which this is a division, and on which a plurality of supply spools 25 are revolublymounted. The periphery of the drum 11. comprises a plurality of equally spaced angle members 26, there Arms 27, guide pulleys 28, are pivoted at 29 to the angle member 26 and form part of a tension control mechanism for maintaining a substantially uniform tension upon thestrands as they are'withdrawn from'the supply spools.

vSince the stranding machine disclosed is of a Well known type and forms no part of this invention, it is thought that a further detailed description thereof is unnecessary.

Figs. 2 and 3 illustrate in detail one of the guide pulleys 28 with an improved guard embodying the features of this invention associated therewith for retaining a strand 36 being drawn from the supply spool 25. The guard 35 comprises a pair of flexible arms 37, preferably of spring steel, one at each side of the guide pulley. and suitably secured at their inner ends about the axis thereof upon the guide pulley supporting arms 27. At their outer ends the arms 37 are each provided upon its inside face with a stud 38 having a rounded outer end, and the rounded outer ends of the studs are normally in engagement illustrated in Fig. 2.

A yieldable split guard of this type is very eflicient in that it is not necessary to thread the strand through an opening as is usual in guide pulleys provided'with some types of guards. machine wherein the guide pulleys are equipped with yieldable split guards, the operator merely presses the strand between the twoengaging rounded ends of the studs 38 and the arms 37 yield, the strand passing therebetWeen and into position upon the guiding surface of the pulley.

trated and described, is particularly well Serial No. 730,153. Divided and this application filed November" In threading a stranding adapted for use in connection With guide pulleys for travehng strands as used on stranding machines, it should be understood that it is not limited thereto but may be applied to other uses Without departing from the spirit and scope of the inventio as defined in the appended claims.-

VVhat is claimed is: v

1. A guard for a traveling material guid ing device, comprising a plurality of flexible members operatively associated-With the device and normally engaging each other at a point adjacent the moving material and centrally disposed With respect to the moving material.

2. A guard for a traveling material guiding device, comprising a plurality of spaced flexible arms operatively associated With the device and normally engaging each other at a point adjacent the moving material and equi-distant from each other.

8. A guard for a pulley, comprising a plurality of flexible members normally engaging each other at a point adjacent the periphery of the pulley and equi-distant from the sides thereof.

4. A guard for a pulley, comprising a pair of flexible members disposed at opposite sides of the pulley and normally engaging each other at their outer ends at a point adjacent the periphery of the pulley and equi-distant from the sides thereof.

5; A guard for a guide pulley, comprising a pair of flexible members disposed at opposite sides of the pulley and normally engaging each other at their outer ends at a point adjacent the periphery of the pulley and centrally disposed With respect to the 'guiding'sur'face of the guide pulley.

6; A guard for a pulley, comprising a pair of flexible arms mounted at the axis of the pulley at opposite sides thereof and normally engaging each other atapoint adjacent the'periphery of the pulley and equi-distant from the sides thereof;

7. A guard for a pulley, comprising a pair of flexible steel arms mounted adjacent the axis of the pulley atopposite sides thereof With their outer ends extending beyond the periphery of the pulley, and studs having rounded ends secured to the outer ends of said arms and extending in a direction parallel to the axis of the pulley and normally engaging each other. at a point equi-distant from the sides of the pulley.

In Witness whereof, I hereunto subscribe my name this 6th day of November A. D., 1925.

HAROLD FRANK JONES. 

